Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity

Authors

  • Akeel Abdullah Mohammed Al-Nahrain University, Baghdad
  • Ansam Adil Mohammed Al-Nahrain University, Baghdad
  • SHYLESHA CHANNAPATTANA KLS Vishwanathrao Institute of Technology Haliyal

DOI:

https://doi.org/10.29194/NJES.26020102

Keywords:

Natural Convection, Horizontal Triangular Enclosure, Inclination Angle, Circular Cylinder

Abstract

A numerical study was performed of natural laminar convective heat transfer to its concentrated triangular enclosure around a horizontal circular cylinder. The air-filled enclosure kept the inner and outer cylinders at uniform temperatures. The Boussinesq density approximation to the momentum problem and the control volume approach iteratively resolved the governing equations to explain buoyancy. CFD results show that the velocity behavior increases by increasing Ra, so the stream lines becomes more sluggish and less uniform behavior and vortices gets less circulated pattern. The rotation angle ? has significant effect on vortices, at 90o gives the higher range of velocity zones of free convection with higher range. The thermal boundary layer seems to be larger in rr=0.455 as compared with rr=0.345 and decreases by increasing ?. The larger variation of isotherms and thermal boundary layer appears at lower ? because the higher heat transfer rate occurs at higher ? and becomes maximum at 90o. Eight correlations of average Nusselt number have been deduced as a function of Rayleigh number for the taken values of aspect ratio and enclosure angles of rotation and inclination.

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Author Biographies

  • Akeel Abdullah Mohammed , Al-Nahrain University, Baghdad

    Mechanical Engg. Dept.,  Al-Nahrain University, Baghdad , Iraq

  • Ansam Adil Mohammed , Al-Nahrain University, Baghdad

    Professor, Mechanical Engg. Dept.,  Al-Nahrain University, Baghdad , Iraq

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Akeel Abdullah Mohammed , ,Ansam Adel Mohammed , Mortada Ahmed Fallehc “Heat Transfer Augmentation in Tube Fitted with Rotating Twisted Tape Insert” Journal of Mechanical Engineering Research and Developments ,ISSN: 1024-1752, CODEN: JERDFO, Vol. 43, No. 7, pp. 308-316,2020.

Akeel Abdullah Mohammed, Ansam Adel Mohammed, Luay Abdulmuttaleb Sadeq “Heat transfer Augmentation in an Inclined Tube Using Perforated Conical Ring Inserts” , Journal of Mechanical Engineering Research and Developments, ISSN: 1024-1752, CODEN: JERDFO, Vol. 43, No. 5, pp. 204-217,2020.

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Published

08-07-2023

How to Cite

[1]
A. A. Mohammed, A. A. Mohammed, and S. CHANNAPATTANA, “Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity”, NJES, vol. 26, no. 2, pp. 102–115, Jul. 2023, doi: 10.29194/NJES.26020102.

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